OIL RETURNING MECHANISM OF FLOODED-EVAPORATOR, AND REFRIGERATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To return a refrigerant oil in a flooded evaporator to a compressor without causing liquid back.;SOLUTION: The oil returning mechanism includes an inner pipe (24) connected to low pressure gas piping (18), an outer pipe (23) of both-end closing type which constitutes a double pipe structure together with the inner pipe (24), and a liquid flow-in pipe (21) whose one end communicates with the inside of a flooded evaporator (14) while the another end communicates between the outer pipe (23) and the inner pipe (24), such that a liquid refrigerant and a refrigerant oil flow in from the flooded evaporator (14). At the bottom part of the inner pipe (24) inside the outer pipe (23), a flow-out hole (25) is formed in which the refrigerant and the refrigerant oil, which have come from the liquid flow-in pipe (21), flow out into the inner pipe (24). At the top part of the inner pipe (24) inside the outer pipe (23), a pressure equalizing hole (26) that equalizes the pressure of the inside and the outside of the inner pipe (24) is formed.;COPYRIGHT: (C)2012,JPO&INPIT